##title=Returns a vocabulary of users in plone

members = context.portal_membership.listMembers()

displayList = []

for member in members:
    memberId = str(member)
    name = "%s (%s)" % (member.getProperty('fullname'), memberId)
    
    displayList.append( (memberId, name))
    
displayList.sort( lambda x,y: cmp( x[1], y[1]))
return displayList    